Collaboration diagram for Math:

Macros
#define	TRIG_MAX_RATIO 0xffff

#define	TRIG_MAX_ANGLE 0x10000

#define	TRIGANGLE_TO_DEG(trig_angle) (((trig_angle) * 360) / TRIG_MAX_ANGLE)

#define	DEG_TO_TRIGANGLE(angle) (((angle) * TRIG_MAX_ANGLE) / 360)

#define	TRIG_MAX_RATIO 0xffff

#define	TRIG_MAX_ANGLE 0x10000

#define	TRIGANGLE_TO_DEG(trig_angle) (((trig_angle) * 360) / TRIG_MAX_ANGLE)

#define	DEG_TO_TRIGANGLE(angle) (((angle) * TRIG_MAX_ANGLE) / 360)

Functions
int32_t	sin_lookup (int32_t angle)

int32_t	cos_lookup (int32_t angle)

int32_t	atan2_lookup (int16_t y, int16_t x)

Detailed Description

Macro Definition Documentation

◆ DEG_TO_TRIGANGLE [1/2]

#define DEG_TO_TRIGANGLE ( angle ) (((angle) * TRIG_MAX_ANGLE) / 360)

Converts from an angle in degrees to the equivalent fixed point value representation

See also: TRIGANGLE_TO_DEG; TRIG_MAX_ANGLE

◆ DEG_TO_TRIGANGLE [2/2]

#define DEG_TO_TRIGANGLE ( angle ) (((angle) * TRIG_MAX_ANGLE) / 360)

Converts from an angle in degrees to the equivalent fixed point value representation

See also: TRIGANGLE_TO_DEG; TRIG_MAX_ANGLE

◆ TRIG_MAX_ANGLE [1/2]

#define TRIG_MAX_ANGLE 0x10000

Angle value that corresponds to 360 degrees or 2 PI radians

See also: sin_lookup; cos_lookup

◆ TRIG_MAX_ANGLE [2/2]

#define TRIG_MAX_ANGLE 0x10000

Angle value that corresponds to 360 degrees or 2 PI radians

See also: sin_lookup; cos_lookup

◆ TRIG_MAX_RATIO [1/2]

#define TRIG_MAX_RATIO 0xffff

The largest value that can result from a call to sin_lookup or cos_lookup. For a code example, see the detailed description at the top of this chapter: Math

◆ TRIG_MAX_RATIO [2/2]

#define TRIG_MAX_RATIO 0xffff

The largest value that can result from a call to sin_lookup or cos_lookup. For a code example, see the detailed description at the top of this chapter: Math

◆ TRIGANGLE_TO_DEG [1/2]

#define TRIGANGLE_TO_DEG ( trig_angle ) (((trig_angle) * 360) / TRIG_MAX_ANGLE)

Converts from a fixed point value representation to the equivalent value in degrees

See also: DEG_TO_TRIGANGLE; TRIG_MAX_ANGLE

◆ TRIGANGLE_TO_DEG [2/2]

#define TRIGANGLE_TO_DEG ( trig_angle ) (((trig_angle) * 360) / TRIG_MAX_ANGLE)

Converts from a fixed point value representation to the equivalent value in degrees

See also: DEG_TO_TRIGANGLE; TRIG_MAX_ANGLE

Function Documentation

◆ atan2_lookup()

int32_t atan2_lookup	(	int16_t	y,
		int16_t	x
	)

Look-up the arctangent of a given x, y pair The angle value is scaled linearly, such that a value of 0x10000 corresponds to 360 degrees or 2 PI radians.

◆ cos_lookup()

int32_t cos_lookup ( int32_t angle )

Look-up the cosine of the given angle from a pre-computed table. This is equivalent to calling sin_lookup(angle + TRIG_MAX_ANGLE / 4).

Parameters

angle The angle for which to compute the cosine. The angle value is scaled linearly, such that a value of 0x10000 corresponds to 360 degrees or 2 PI radians.

◆ sin_lookup()

int32_t sin_lookup ( int32_t angle )

Look-up the sine of the given angle from a pre-computed table.